They found evidence for two mirror-symmetric tonotopic maps encompassing the aforementioned three frequency-specific regions - the first connected a high-frequency region in HS with a low-frequency region in mid-HG and the second connected the same low-frequency region with a high-frequency region near the junction of HG and the superior temporal gyrus (STG).

In contrast, fMRI studies of the tonotopic organization of human auditory cortex have typically imaged subjects in a single experimental session on activations in auditory cortex, the influence of these variables on tonotopic and non-tonotopic ACFs is not yet fully understood.

Figure 14 shows a schematic model of these fields superimposed on the grand mean tonotopic maps from the current study using a model similar to models of macaque auditory cortex A schematic model of human auditory cortical fields.

Studies of tonotopic organization have revealed that the anatomical locations of frequency-specific regions have a coarse but consistent relationship to local anatomical landmarks in individual subjects